Holder to Issa: Your conduct is shameful

Attorney General Eric Holder, the nation's top law enforcement official, testifies on Capitol Hill in Washington, Wednesday, May 15, 2013, before the House Judiciary Committee oversight hearing on the U.S. Department of Justice. (AP Photo/J. Scott Applewhite)

Attorney General Eric Holder, the nation's top law enforcement official, testifies on Capitol Hill in Washington, Wednesday, May 15, 2013, before the House Judiciary Committee oversight hearing on the U.S. Department of Justice. (AP Photo/J. Scott Applewhite)